The size is 6 ½" x 4 ½", with a pre-printed special-issue commemorative postal stamp. Postally unused, published by the Ministry of Communications of the USSR, circulation unknown. The commemorative stamp shows a portrait of Ludwik Zamenhof, a Polish doctor of Jewish descent. Growing up in a multi-lingual environment and seeing hostility between different groups of people speaking different languages, Zamenhof ascribed the hostility to lack of a common language and came up with the idea of an international language which, he hoped, would resolve the problem. He even took a pseudonym "Dr. Esperanto" (Dr. Hopeful). Himself in command of eight languages, he came up with Lingvo Internacia and published a textbook introducing it to the public. The language became commonly known as Esparanto by the author's pseudonym.

In excellent condition.